Machine tool



FIG. 1 is a top view of a machine tool according to an embodiment of thepresent invention;

FIG. 2 is a bottom view of the machine tool of FIG. 1;

FIG. 3 is a perspective view of the machine tool;

FIG. 4 is a first side view of the machine tool;

FIG. 5 is a second side view of the machine tool, opposite from andidentical to the first side;

FIG. 6 is a third side view of the machine tool; and,

FIG. 7 is a fourth side view of the machine tool, opposite from andidentical to the third side.

The ornamental design for a machine tool, as shown and described.